add package testcapture, package assert (minimal implementation)

1 files changed, 31 insertions, 0 deletions

diff --git a/assert/equal_test.go b/assert/equal_test.go
new file mode 100644
index 0000000..c710cea
--- /dev/null
+++ b/assert/equal_test.go
@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2026 Stefan Majewsky <majewsky@gmx.net>
+// SPDX-License-Identifier: Apache-2.0
+
+package assert_test
+
+import (
+	"strings"
+	"testing"
+
+	"go.xyrillian.de/gg/assert"
+	"go.xyrillian.de/gg/testcapture"
+)
+
+func expectErrors(t *testing.T, test func(assert.TestingTB), expected string) {
+	t.Helper()
+	r := testcapture.Result{Outcome: testcapture.OutcomeFailed}
+	for line := range strings.SplitSeq(expected, "\n") {
+		line = strings.TrimSpace(line)
+		if line != "" {
+			r.Messages = append(r.Messages, testcapture.Log(line))
+		}
+	}
+	assert.Equal(t, testcapture.Capture(t.Context(), t.Name(), test), r)
+}
+
+func TestEqual(t *testing.T) {
+	assert.Equal(t, true, true)
+	expectErrors(t, func(t assert.TestingTB) {
+		assert.Equal(t, false, true)
+	}, `expected true, but got false`)
+}