Reogranise functions into appropriate files

cif/metadata.go

@@ -33,7 +33,7 @@ func checkMetadata(oldMeta *dbAccess.CifMetadata, newMeta *upstreamApi.JsonTimet
 
 // Evaluates whether the given time is after yesterday at 0600
 func isAfterYesterdayAt0600(t time.Time) bool {
-	yesterday0600 := time.Now().In(time.UTC).AddDate(0, 0, -1)
+	yesterday0600 := time.Now().In(londonTimezone).AddDate(0, 0, -1)
 	yesterday0600 = time.Date(yesterday0600.Year(), yesterday0600.Month(), yesterday0600.Day(), 6, 0, 0, 0, time.UTC)
 	return t.After(yesterday0600)
 }

cif/metadata_test.go

@@ -56,3 +56,27 @@ func TestGenerateMetadata(t *testing.T) {
 		t.Errorf("LastUpdate: expected %s, got %s", expected.LastUpdate, result.LastUpdate)
 	}
 }
+
+func TestIsAfterYesterdayAt0600(t *testing.T) {
+	yesterday0600 := time.Now().In(londonTimezone).AddDate(0, 0, -1).Truncate(24 * time.Hour).Add(6 * time.Hour)
+
+	testCases := []struct {
+		input  time.Time
+		expect bool
+	}{
+		{yesterday0600.Add(-1 * time.Hour), false},
+		{yesterday0600.Add(-12 * time.Hour), false},
+		{yesterday0600.Add(-24 * time.Hour), false},
+		{yesterday0600.Add(1 * time.Microsecond), true},
+		{yesterday0600.Add(1 * time.Hour), true},
+		{yesterday0600.Add(12 * time.Hour), true},
+		{yesterday0600.Add(24 * time.Hour), true},
+	}
+
+	for _, tc := range testCases {
+		result := isAfterYesterdayAt0600(tc.input)
+		if result != tc.expect {
+			t.Errorf("For input %v, expected %t, but got %t", tc.input, tc.expect, result)
+		}
+	}
+}