Move SPC provider fixture helper

internal/providers/spc/fixture_test.go

@@ -0,0 +1,17 @@
+package spc
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func readTestFile(t *testing.T, name string) []byte {
+	t.Helper()
+	path := filepath.Join("testdata", name)
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("read %s: %v", path, err)
+	}
+	return raw
+}

internal/providers/spc/geojson_test.go

@@ -1,8 +1,6 @@
 package spc
 
 import (
-	"os"
-	"path/filepath"
 	"strings"
 	"testing"
 	"time"
@@ -78,13 +76,3 @@ func TestParseISOTimestampTrimsAndReturnsUTC(t *testing.T) {
 		t.Fatalf("ParseISOTimestamp() = %s, want %s", got, want)
 	}
 }
-
-func readTestFile(t *testing.T, name string) []byte {
-	t.Helper()
-	path := filepath.Join("testdata", name)
-	raw, err := os.ReadFile(path)
-	if err != nil {
-		t.Fatalf("read %s: %v", path, err)
-	}
-	return raw
-}