init
This commit is contained in:
Kevin McIntyre
481
jdenticon/hash_test.go
Normal file
481
jdenticon/hash_test.go
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@@ -0,0 +1,481 @@
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package jdenticon
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import (
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"strings"
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"testing"
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)
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func TestComputeHash(t *testing.T) {
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tests := []struct {
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name string
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input interface{}
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expected string // Known SHA-1 hash values
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}{
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{
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name: "empty string",
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input: "",
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expected: "da39a3ee5e6b4b0d3255bfef95601890afd80709",
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},
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{
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name: "simple string",
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input: "hello",
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expected: "aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d",
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},
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{
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name: "email address",
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input: "user@example.com",
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expected: "63a710569261a24b3766275b7000ce8d7b32e2f7",
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},
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{
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name: "nil input",
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input: nil,
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expected: "da39a3ee5e6b4b0d3255bfef95601890afd80709", // Same as empty string
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},
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{
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name: "integer input",
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input: 123,
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expected: "40bd001563085fc35165329ea1ff5c5ecbdbbeef", // SHA-1 of "123"
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},
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{
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name: "byte slice input",
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input: []byte("test"),
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expected: "a94a8fe5ccb19ba61c4c0873d391e987982fbbd3",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result := ComputeHash(tt.input)
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if result != tt.expected {
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t.Errorf("ComputeHash(%v) = %s, want %s", tt.input, result, tt.expected)
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}
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})
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}
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}
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func TestHashValue(t *testing.T) {
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// Test that HashValue produces the same result as ComputeHash for strings
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testStrings := []string{"", "hello", "user@example.com", "test123"}
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for _, str := range testStrings {
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hashValue := HashValue(str)
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computeHash := ComputeHash(str)
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if hashValue != computeHash {
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t.Errorf("HashValue(%s) = %s, but ComputeHash(%s) = %s", str, hashValue, str, computeHash)
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}
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}
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}
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func TestIsValidHash(t *testing.T) {
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tests := []struct {
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name string
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input string
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expected bool
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}{
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{
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name: "valid long hash",
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input: "da39a3ee5e6b4b0d3255bfef95601890afd80709",
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expected: true,
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},
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{
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name: "valid minimum length",
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input: "da39a3ee5e6",
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expected: true,
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},
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{
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name: "too short",
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input: "da39a3ee5e",
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expected: false,
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},
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{
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name: "invalid character",
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input: "da39a3ee5e6g4b0d3255bfef95601890afd80709",
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expected: false,
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},
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{
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name: "uppercase valid",
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input: "DA39A3EE5E6B4B0D3255BFEF95601890AFD80709",
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expected: true,
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},
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{
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name: "empty string",
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input: "",
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expected: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result := isValidHash(tt.input)
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if result != tt.expected {
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t.Errorf("isValidHash(%s) = %v, want %v", tt.input, result, tt.expected)
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}
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})
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}
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}
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func TestParseHex(t *testing.T) {
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hash := "da39a3ee5e6b4b0d3255bfef95601890afd80709"
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tests := []struct {
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name string
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startPosition int
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octets int
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expected int
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}{
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{
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name: "first character",
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startPosition: 0,
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octets: 1,
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expected: 0xd, // 'd' in hex
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},
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{
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name: "two characters",
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startPosition: 0,
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octets: 2,
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expected: 0xda,
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},
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{
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name: "middle position",
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startPosition: 10,
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octets: 1,
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expected: 0x6, // '6' at position 10
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},
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{
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name: "negative index",
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startPosition: -1,
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octets: 1,
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expected: 0x9, // last character '9'
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},
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{
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name: "negative index multiple chars",
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startPosition: -2,
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octets: 2,
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expected: 0x09, // last two characters "09"
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},
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{
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name: "out of bounds",
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startPosition: 100,
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octets: 1,
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expected: 0,
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},
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{
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name: "zero octets reads to end",
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startPosition: -7,
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octets: 0,
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expected: 0xfd80709, // Last 7 characters "fd80709"
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := parseHex(hash, tt.startPosition, tt.octets)
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if err != nil {
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// For out of bounds case, we expect an error but return 0
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if tt.expected == 0 && tt.name == "out of bounds" {
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// This is expected
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return
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}
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t.Errorf("parseHex(%s, %d, %d) unexpected error: %v", hash, tt.startPosition, tt.octets, err)
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return
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}
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if result != tt.expected {
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t.Errorf("parseHex(%s, %d, %d) = %d, want %d", hash, tt.startPosition, tt.octets, result, tt.expected)
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}
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})
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}
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}
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func TestParseHexErrors(t *testing.T) {
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tests := []struct {
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name string
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hash string
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startPosition int
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octets int
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expectError bool
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errorContains string
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}{
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{
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name: "invalid hex character",
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hash: "da39g3ee5e6b4b0d3255bfef95601890afd80709",
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startPosition: 4,
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octets: 1,
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expectError: true,
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errorContains: "failed to parse hex",
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},
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{
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name: "out of bounds positive",
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hash: "da39a3ee",
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startPosition: 10,
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octets: 1,
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expectError: true,
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errorContains: "out of bounds",
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},
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{
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name: "out of bounds negative",
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hash: "da39a3ee",
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startPosition: -20,
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octets: 1,
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expectError: true,
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errorContains: "out of bounds",
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},
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{
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name: "valid hex",
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hash: "da39a3ee5e6b4b0d3255bfef95601890afd80709",
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startPosition: 0,
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octets: 2,
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expectError: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := parseHex(tt.hash, tt.startPosition, tt.octets)
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if tt.expectError {
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if err == nil {
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t.Errorf("parseHex(%s, %d, %d) expected error, got nil", tt.hash, tt.startPosition, tt.octets)
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return
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}
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if tt.errorContains != "" && !strings.Contains(err.Error(), tt.errorContains) {
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t.Errorf("parseHex(%s, %d, %d) error = %v, want error containing %s", tt.hash, tt.startPosition, tt.octets, err, tt.errorContains)
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}
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} else {
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if err != nil {
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t.Errorf("parseHex(%s, %d, %d) unexpected error: %v", tt.hash, tt.startPosition, tt.octets, err)
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}
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// For valid case, just ensure no error and result >= 0
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if result < 0 {
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t.Errorf("parseHex(%s, %d, %d) = %d, want >= 0", tt.hash, tt.startPosition, tt.octets, result)
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}
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}
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})
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}
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}
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func TestParseHash(t *testing.T) {
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tests := []struct {
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name string
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input string
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expectError bool
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expected []byte
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}{
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{
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name: "valid hex string",
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input: "da39a3ee",
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expectError: false,
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expected: []byte{0xda, 0x39, 0xa3, 0xee},
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},
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{
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name: "with 0x prefix",
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input: "0xda39a3ee",
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expectError: false,
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expected: []byte{0xda, 0x39, 0xa3, 0xee},
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},
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{
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name: "with 0X prefix",
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input: "0Xda39a3ee",
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expectError: false,
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expected: []byte{0xda, 0x39, 0xa3, 0xee},
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},
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{
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name: "uppercase hex",
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input: "DA39A3EE",
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expectError: false,
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expected: []byte{0xda, 0x39, 0xa3, 0xee},
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},
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{
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name: "empty string",
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input: "",
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expectError: true,
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expected: nil,
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},
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{
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name: "odd length",
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input: "da39a3e",
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expectError: true,
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expected: nil,
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},
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{
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name: "invalid character",
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input: "da39g3ee",
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expectError: true,
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expected: nil,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := ParseHash(tt.input)
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if tt.expectError {
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if err == nil {
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t.Errorf("ParseHash(%s) expected error, got nil", tt.input)
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}
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} else {
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if err != nil {
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t.Errorf("ParseHash(%s) unexpected error: %v", tt.input, err)
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}
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if len(result) != len(tt.expected) {
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t.Errorf("ParseHash(%s) length = %d, want %d", tt.input, len(result), len(tt.expected))
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}
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for i, b := range result {
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if i < len(tt.expected) && b != tt.expected[i] {
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t.Errorf("ParseHash(%s)[%d] = %x, want %x", tt.input, i, b, tt.expected[i])
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}
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}
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}
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})
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}
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}
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func TestExtractHue(t *testing.T) {
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// Test with a known hash to ensure consistent behavior with JavaScript
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hash := "da39a3ee5e6b4b0d3255bfef95601890afd80709"
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hue := ExtractHue(hash)
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// Verify it's in [0,1] range
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if hue < 0.0 || hue > 1.0 {
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t.Errorf("ExtractHue(%s) = %f, want value in [0,1] range", hash, hue)
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}
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// Verify it matches manual calculation
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expectedValue, err := parseHex(hash, -7, 0)
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if err != nil {
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t.Fatalf("parseHex failed: %v", err)
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}
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expectedHue := float64(expectedValue) / 0xfffffff
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if hue != expectedHue {
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t.Errorf("ExtractHue(%s) = %f, want %f", hash, hue, expectedHue)
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}
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// Test error cases - should return 0.0 for JavaScript compatibility
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t.Run("invalid hash", func(t *testing.T) {
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invalidHash := "invalid-hash-with-non-hex-chars"
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hue := ExtractHue(invalidHash)
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if hue != 0.0 {
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t.Errorf("ExtractHue with invalid hash should return 0.0, got %f", hue)
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}
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})
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t.Run("short hash", func(t *testing.T) {
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shortHash := "short"
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hue := ExtractHue(shortHash)
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if hue != 0.0 {
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t.Errorf("ExtractHue with short hash should return 0.0, got %f", hue)
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}
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})
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}
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func TestExtractShapeIndex(t *testing.T) {
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hash := "da39a3ee5e6b4b0d3255bfef95601890afd80709"
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tests := []struct {
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position int
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expected int
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}{
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{1, 0xa}, // 'a' at position 1
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{2, 0x3}, // '3' at position 2
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{4, 0xa}, // 'a' at position 4
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}
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for _, tt := range tests {
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result := ExtractShapeIndex(hash, tt.position)
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if result != tt.expected {
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t.Errorf("ExtractShapeIndex(%s, %d) = %d, want %d", hash, tt.position, result, tt.expected)
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}
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}
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// Test error cases - should return 0 for JavaScript compatibility
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t.Run("invalid hash", func(t *testing.T) {
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invalidHash := "invalid-hash-with-non-hex-chars"
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result := ExtractShapeIndex(invalidHash, 0)
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if result != 0 {
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t.Errorf("ExtractShapeIndex with invalid hash should return 0, got %d", result)
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}
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})
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t.Run("out of bounds position", func(t *testing.T) {
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result := ExtractShapeIndex(hash, 100)
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if result != 0 {
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t.Errorf("ExtractShapeIndex with out of bounds position should return 0, got %d", result)
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}
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})
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}
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func TestExtractColorIndex(t *testing.T) {
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hash := "da39a3ee5e6b4b0d3255bfef95601890afd80709"
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// Test modulo behavior
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availableColors := 5
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position := 8
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rawValue, err := parseHex(hash, position, 1)
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if err != nil {
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t.Fatalf("parseHex failed: %v", err)
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}
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expected := rawValue % availableColors
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result := ExtractColorIndex(hash, position, availableColors)
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if result != expected {
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t.Errorf("ExtractColorIndex(%s, %d, %d) = %d, want %d", hash, position, availableColors, result, expected)
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}
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// Test with zero availableColors
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result = ExtractColorIndex(hash, position, 0)
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if result != rawValue {
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t.Errorf("ExtractColorIndex(%s, %d, 0) = %d, want %d", hash, position, result, rawValue)
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}
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// Test error cases - should return 0 for JavaScript compatibility
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t.Run("invalid hash", func(t *testing.T) {
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invalidHash := "invalid-hash-with-non-hex-chars"
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result := ExtractColorIndex(invalidHash, 0, 5)
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if result != 0 {
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t.Errorf("ExtractColorIndex with invalid hash should return 0, got %d", result)
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}
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})
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t.Run("out of bounds position", func(t *testing.T) {
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result := ExtractColorIndex(hash, 100, 5)
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if result != 0 {
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t.Errorf("ExtractColorIndex with out of bounds position should return 0, got %d", result)
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}
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})
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}
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func TestExtractRotation(t *testing.T) {
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hash := "da39a3ee5e6b4b0d3255bfef95601890afd80709"
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tests := []struct {
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position int
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expected int
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}{
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{0, 0xd}, // 'd' at position 0
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{1, 0xa}, // 'a' at position 1
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{5, 0x3}, // '3' at position 5
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}
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for _, tt := range tests {
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result := ExtractRotation(hash, tt.position)
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if result != tt.expected {
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t.Errorf("ExtractRotation(%s, %d) = %d, want %d", hash, tt.position, result, tt.expected)
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}
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}
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// Test error cases - should return 0 for JavaScript compatibility
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t.Run("invalid hash", func(t *testing.T) {
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invalidHash := "invalid-hash-with-non-hex-chars"
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result := ExtractRotation(invalidHash, 0)
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if result != 0 {
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t.Errorf("ExtractRotation with invalid hash should return 0, got %d", result)
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}
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})
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t.Run("out of bounds position", func(t *testing.T) {
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result := ExtractRotation(hash, 100)
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if result != 0 {
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t.Errorf("ExtractRotation with out of bounds position should return 0, got %d", result)
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}
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})
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}
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