From a7d8ce73b945b658cecaa0337a114b0e4ae01eda Mon Sep 17 00:00:00 2001
From: Charles Iliya Krempeaux <iamreiver@gmail.com>
Date: Tue, 13 Feb 2024 11:17:24 -0800
Subject: [PATCH] initial commits

---
 writeframebutton4.go      | 21 ++++++++++++
 writeframebutton4_test.go | 68 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 writeframebutton4.go
 create mode 100644 writeframebutton4_test.go

diff --git a/writeframebutton4.go b/writeframebutton4.go
new file mode 100644
index 0000000..46bd2ec
--- /dev/null
+++ b/writeframebutton4.go
@@ -0,0 +1,21 @@
+package frameproto
+
+import (
+	"io"
+)
+
+// WriteFrameButton4 will write the HTML <meta/> element for the Frame-Protocol's (i.e., Farcaster Frame's) "fc:frame:button:4" name-value pair.
+//
+// For example, this call:
+//
+//	var label string = "go forward"
+//	
+//	frameproto.WriteFrameButton4(writer, label)
+//
+// Would write this HTML <meta/> element:
+//
+//	<meta property="fc:frame:button:4" content="go forward" />
+func WriteFrameButton4(writer io.Writer, label string) {
+	const property string = MetaPropertyFrameButton4
+	writeMetaPropertyContent(writer, property, label)
+}
diff --git a/writeframebutton4_test.go b/writeframebutton4_test.go
new file mode 100644
index 0000000..1b33352
--- /dev/null
+++ b/writeframebutton4_test.go
@@ -0,0 +1,68 @@
+package frameproto
+
+import (
+	"testing"
+
+	"strings"
+)
+
+func TestWriteFrameButton4(t *testing.T) {
+
+	tests := []struct{
+		Label string
+		Expected string
+	}{
+		{
+			Label: "",
+			Expected: `<meta property="fc:frame:button:4" content="" />`+"\n",
+		},
+
+
+
+		{
+			Label: "something",
+			Expected: `<meta property="fc:frame:button:4" content="something" />`+"\n",
+		},
+
+
+
+		{
+			Label: "Hello world! 🙂",
+			Expected: `<meta property="fc:frame:button:4" content="Hello world! 🙂" />`+"\n",
+		},
+
+
+
+		{
+			Label: "go forward",
+			Expected: `<meta property="fc:frame:button:4" content="go forward" />`+"\n",
+		},
+
+
+
+		{
+			Label: "I like to eat, eat, eat, apples and bananas",
+			Expected: `<meta property="fc:frame:button:4" content="I like to eat, eat, eat, apples and bananas" />`+"\n",
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		var buffer strings.Builder
+
+		WriteFrameButton4(&buffer, test.Label)
+
+		expected := test.Expected
+		actual   := buffer.String()
+
+		if expected != actual {
+			t.Errorf("For test #%d, the actual written meta-tag is not what was expected." ,testNumber)
+			t.Logf("EXPECTED: %s", expected)
+			t.Logf("ACTUAL:   %s", actual)
+			t.Logf("EXPECTED: %q", expected)
+			t.Logf("ACTUAL:   %q", actual)
+			t.Logf("LABEL: %q", test.Label)
+			continue
+		}
+	}
+}