From 18a8a568a2db048f461d0a67187d5a3a810a8dd8 Mon Sep 17 00:00:00 2001
From: Charles Iliya Krempeaux <iamreiver@gmail.com>
Date: Sun, 13 Nov 2022 20:56:26 -0800
Subject: [PATCH] initial commits

---
 copyline_test.go | 186 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 copyline_test.go

diff --git a/copyline_test.go b/copyline_test.go
new file mode 100644
index 0000000..4da36bc
--- /dev/null
+++ b/copyline_test.go
@@ -0,0 +1,186 @@
+package netln_test
+
+import (
+	"github.com/reiver/go-netln"
+
+	"io"
+	"strings"
+
+	"testing"
+)
+
+func TestCopyLine(t *testing.T) {
+
+	tests := []struct{
+		Src string
+		Expected string
+	}{
+		{
+			Src:      "apple banana cherry",
+			Expected: "apple banana cherry",
+		},
+		{
+			Src:      "apple banana cherry"+"\r",
+			Expected: "apple banana cherry"+"\r",
+		},
+		{
+			Src:      "apple banana cherry"+"\n",
+			Expected: "apple banana cherry"+"\n",
+		},
+		{
+			Src:      "apple banana cherry"+"\r\n",
+			Expected: "apple banana cherry",
+		},
+		{
+			Src:      "apple banana cherry"+"\r"+"hello world",
+			Expected: "apple banana cherry"+"\r"+"hello world",
+		},
+		{
+			Src:      "apple banana cherry"+"\n"+"hello world",
+			Expected: "apple banana cherry"+"\n"+"hello world",
+		},
+		{
+			Src:      "apple banana cherry"+"\r\n"+"hello world",
+			Expected: "apple banana cherry",
+		},
+		{
+			Src:      "apple banana cherry"+"\r"+"hello world"+"\r",
+			Expected: "apple banana cherry"+"\r"+"hello world"+"\r",
+		},
+		{
+			Src:      "apple banana cherry"+"\r"+"hello world"+"\n",
+			Expected: "apple banana cherry"+"\r"+"hello world"+"\n",
+		},
+		{
+			Src:      "apple banana cherry"+"\r"+"hello world"+"\r\n",
+			Expected: "apple banana cherry"+"\r"+"hello world",
+		},
+		{
+			Src:      "apple banana cherry"+"\n"+"hello world"+"\r",
+			Expected: "apple banana cherry"+"\n"+"hello world"+"\r",
+		},
+		{
+			Src:      "apple banana cherry"+"\n"+"hello world"+"\n",
+			Expected: "apple banana cherry"+"\n"+"hello world"+"\n",
+		},
+		{
+			Src:      "apple banana cherry"+"\n"+"hello world"+"\r\n",
+			Expected: "apple banana cherry"+"\n"+"hello world",
+		},
+		{
+			Src:      "apple banana cherry"+"\r\n"+"hello world"+"\r\n",
+			Expected: "apple banana cherry",
+		},
+
+
+
+		{
+			Src:      "r۵≡🙂",
+			Expected: "r۵≡🙂",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r",
+			Expected: "r۵≡🙂"+"\r",
+		},
+		{
+			Src:      "r۵≡🙂"+"\n",
+			Expected: "r۵≡🙂"+"\n",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r\n",
+			Expected: "r۵≡🙂",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r"+"once twice thrice fource",
+			Expected: "r۵≡🙂"+"\r"+"once twice thrice fource",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r"+"once twice thrice fource"+"\r",
+			Expected: "r۵≡🙂"+"\r"+"once twice thrice fource"+"\r",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r"+"once twice thrice fource"+"\n",
+			Expected: "r۵≡🙂"+"\r"+"once twice thrice fource"+"\n",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r"+"once twice thrice fource"+"\r\n",
+			Expected: "r۵≡🙂"+"\r"+"once twice thrice fource",
+		},
+		{
+			Src:      "r۵≡🙂"+"\n"+"once twice thrice fource",
+			Expected: "r۵≡🙂"+"\n"+"once twice thrice fource",
+		},
+		{
+			Src:      "r۵≡🙂"+"\n"+"once twice thrice fource"+"\r",
+			Expected: "r۵≡🙂"+"\n"+"once twice thrice fource"+"\r",
+		},
+		{
+			Src:      "r۵≡🙂"+"\n"+"once twice thrice fource"+"\n",
+			Expected: "r۵≡🙂"+"\n"+"once twice thrice fource"+"\n",
+		},
+		{
+			Src:      "r۵≡🙂"+"\n"+"once twice thrice fource"+"\r\n",
+			Expected: "r۵≡🙂"+"\n"+"once twice thrice fource",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r\n"+"once twice thrice fource",
+			Expected: "r۵≡🙂",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r\n"+"once twice thrice fource"+"\r",
+			Expected: "r۵≡🙂",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r\n"+"once twice thrice fource"+"\n",
+			Expected: "r۵≡🙂",
+		},
+		{
+			Src:      "r۵≡🙂"+"\r\n"+"once twice thrice fource"+"\r\n",
+			Expected: "r۵≡🙂",
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		var actualStorage strings.Builder
+
+		var reader io.Reader = strings.NewReader(test.Src)
+
+		actualN, err := netln.CopyLine(&actualStorage, reader)
+		if nil != err {
+			t.Errorf("For test #%d, did not expect an error but actually got one.", testNumber)
+			t.Logf("ERROR: (%T) %q", err, err)
+			t.Logf("SRC: %q", test.Src)
+			t.Logf("ACTUAL-N: %d", actualN)
+			continue
+		}
+
+		{
+			var expected int64 = int64(len(test.Expected))
+			var actual   int64 = actualN
+
+			if expected != actual {
+				t.Errorf("For test #%d, the actual number of bytes written is not what was expected.", testNumber)
+				t.Logf("EXPECTED: %d bytes", expected)
+				t.Logf("ACTUAL:   %d bytes", actual)
+				t.Logf("SRC:          %q", test.Src)
+				t.Logf("EXPECTED-DST: %q", test.Expected)
+				t.Logf("ACTUAL-DST:   %q", actualStorage.String())
+				continue
+			}
+		}
+
+		{
+			var expected string = test.Expected
+			var actual   string = actualStorage.String()
+
+			if expected != actual {
+				t.Errorf("For test #%d, the actual value of what was written is not what was expected", testNumber)
+				t.Logf("EXPECTED: %q", expected)
+				t.Logf("ACTUAL:   %q", actual)
+				t.Logf("SRC:      %q", test.Src)
+				continue
+			}
+		}
+	}
+}