Initial commit

Signed-off-by: Thomas Klaehn <thomas.klaehn@perinet.io>
2026-02-08 07:28:32 +00:00
commit 88b74b7dbc
7 changed files with 1567 additions and 0 deletions
--- a/fitparser/decoder_test.go
+++ b/fitparser/decoder_test.go
@@ -0,0 +1,246 @@
+package fitparser
+
+import (
+	"fmt"
+	"os"
+	"testing"
+)
+
+func TestIsFIT(t *testing.T) {
+	tests := []struct {
+		name     string
+		data     []byte
+		expected bool
+	}{
+		{
+			name:     "Valid FIT signature",
+			data:     []byte{0x0E, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, '.', 'F', 'I', 'T', 0x00, 0x00},
+			expected: true,
+		},
+		{
+			name:     "Invalid signature",
+			data:     []byte{0x0E, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 'N', 'O', 'T', 'F', 0x00, 0x00},
+			expected: false,
+		},
+		{
+			name:     "Too short",
+			data:     []byte{0x0E, 0x10},
+			expected: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := IsFIT(tt.data)
+			if result != tt.expected {
+				t.Errorf("IsFIT() = %v, want %v", result, tt.expected)
+			}
+		})
+	}
+}
+
+func TestCalculateCRC(t *testing.T) {
+	// Test with known CRC values
+	data := []byte{0x0E, 0x10, 0xD9, 0x07, 0x00, 0x00, 0x00, 0x00, '.', 'F', 'I', 'T'}
+	crc := CalculateCRC(data)
+
+	// CRC should be non-zero for this data
+	if crc == 0 {
+		t.Errorf("CalculateCRC() returned 0, expected non-zero value")
+	}
+
+	// Test that same data produces same CRC
+	crc2 := CalculateCRC(data)
+	if crc != crc2 {
+		t.Errorf("CalculateCRC() not deterministic: got %d and %d", crc, crc2)
+	}
+}
+
+func TestParseHeader(t *testing.T) {
+	tests := []struct {
+		name    string
+		data    []byte
+		wantErr bool
+	}{
+		{
+			name:    "Valid 12-byte header",
+			data:    []byte{0x0C, 0x10, 0xD9, 0x07, 0x10, 0x00, 0x00, 0x00, '.', 'F', 'I', 'T'},
+			wantErr: false,
+		},
+		{
+			name:    "Too short",
+			data:    []byte{0x0C, 0x10},
+			wantErr: true,
+		},
+		{
+			name:    "Invalid signature",
+			data:    []byte{0x0C, 0x10, 0xD9, 0x07, 0x10, 0x00, 0x00, 0x00, 'N', 'O', 'P', 'E'},
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			header, err := ParseHeader(tt.data)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ParseHeader() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !tt.wantErr && header == nil {
+				t.Errorf("ParseHeader() returned nil header without error")
+			}
+		})
+	}
+}
+
+func TestDecodeActivityFile(t *testing.T) {
+	// Test with a real FIT file from the SDK examples
+	filePath := "../example/testdata/Activity.fit"
+
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		t.Fatalf("Error reading test file %s: %v", filePath, err)
+	}
+
+	decoder, err := NewDecoder(data)
+	if err != nil {
+		t.Fatalf("NewDecoder() error = %v", err)
+	}
+
+	messages, err := decoder.Decode()
+	if err != nil {
+		t.Fatalf("Decode() error = %v", err)
+	}
+
+	if len(messages) == 0 {
+		t.Error("Decode() returned no messages")
+	}
+
+	// Print some statistics
+	t.Logf("Successfully decoded %d messages", len(messages))
+
+	// Count message types
+	msgCounts := make(map[uint16]int)
+	for _, msg := range messages {
+		msgCounts[msg.Num]++
+	}
+
+	t.Logf("Message type breakdown:")
+	for mesgNum, count := range msgCounts {
+		t.Logf("  %s (%d): %d messages", GetMessageName(mesgNum), mesgNum, count)
+	}
+
+	// Verify we have essential messages
+	if msgCounts[MesgNumFileId] == 0 {
+		t.Error("Expected at least one FileId message")
+	}
+	if msgCounts[MesgNumRecord] == 0 {
+		t.Error("Expected at least one Record message")
+	}
+}
+
+func TestDecodeSettingsFile(t *testing.T) {
+	filePath := "../example/testdata/Settings.fit"
+
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		t.Fatalf("Error reading test file %s: %v", filePath, err)
+	}
+
+	decoder, err := NewDecoder(data)
+	if err != nil {
+		t.Fatalf("NewDecoder() error = %v", err)
+	}
+
+	messages, err := decoder.Decode()
+	if err != nil {
+		t.Fatalf("Decode() error = %v", err)
+	}
+
+	if len(messages) == 0 {
+		t.Error("Decode() returned no messages")
+	}
+
+	t.Logf("Successfully decoded %d messages from Settings.fit", len(messages))
+}
+
+func TestCheckIntegrity(t *testing.T) {
+	filePath := "../example/testdata/Activity.fit"
+
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		t.Fatalf("Error reading test file %s: %v", filePath, err)
+	}
+
+	err = CheckIntegrity(data)
+	if err != nil {
+		t.Errorf("CheckIntegrity() error = %v", err)
+	}
+}
+
+func TestConvertSemicirclesToDegrees(t *testing.T) {
+	tests := []struct {
+		semicircles int32
+		expected    float64
+	}{
+		{0, 0.0},
+		{2147483647, 180.0},    // Max positive (approximately)
+		{-2147483648, -180.0},  // Max negative (approximately)
+		{1073741824, 90.0},     // Quarter circle
+	}
+
+	for _, tt := range tests {
+		t.Run(fmt.Sprintf("%d_semicircles", tt.semicircles), func(t *testing.T) {
+			result := ConvertSemicirclesToDegrees(tt.semicircles)
+			// Allow small floating point error
+			if result < tt.expected-0.1 || result > tt.expected+0.1 {
+				t.Errorf("ConvertSemicirclesToDegrees(%d) = %f, want %f", tt.semicircles, result, tt.expected)
+			}
+		})
+	}
+}
+
+func BenchmarkDecode(b *testing.B) {
+	filePath := "../example/testdata/Activity.fit"
+
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		b.Fatalf("Error reading test file %s: %v", filePath, err)
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		decoder, err := NewDecoder(data)
+		if err != nil {
+			b.Fatalf("NewDecoder() error = %v", err)
+		}
+
+		_, err = decoder.Decode()
+		if err != nil {
+			b.Fatalf("Decode() error = %v", err)
+		}
+	}
+}
+
+func BenchmarkDecodeNoCRC(b *testing.B) {
+	filePath := "../example/testdata/Activity.fit"
+
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		b.Fatalf("Error reading test file %s: %v", filePath, err)
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		decoder, err := NewDecoder(data)
+		if err != nil {
+			b.Fatalf("NewDecoder() error = %v", err)
+		}
+
+		decoder.EnableCRCCheck(false)
+		_, err = decoder.Decode()
+		if err != nil {
+			b.Fatalf("Decode() error = %v", err)
+		}
+	}
+}