Adding the challenge 0501

0501/row_test.go

@@ -0,0 +1,70 @@
+package db0501
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRowEncode(t *testing.T) {
+	schema := &Schema{
+		Table: "link",
+		Cols: []Column{
+			{Name: "time", Type: TypeI64},
+			{Name: "src", Type: TypeStr},
+			{Name: "dst", Type: TypeStr},
+		},
+		PKey: []int{2, 1}, // (dst, src)
+	}
+
+	row := Row{
+		Cell{Type: TypeI64, I64: 123},
+		Cell{Type: TypeStr, Str: []byte("a")},
+		Cell{Type: TypeStr, Str: []byte("b")},
+	}
+	key := []byte{'l', 'i', 'n', 'k', 0, byte(TypeStr), 'b', 0, byte(TypeStr), 'a', 0, 0}
+	val := []byte{123, 0, 0, 0, 0, 0, 0, 0}
+	assert.Equal(t, key, row.EncodeKey(schema))
+	assert.Equal(t, val, row.EncodeVal(schema))
+
+	decoded := schema.NewRow()
+	err := decoded.DecodeKey(schema, key)
+	assert.Nil(t, err)
+	err = decoded.DecodeVal(schema, val)
+	assert.Nil(t, err)
+	assert.Equal(t, row, decoded)
+
+	rows := []Row{
+		{
+			Cell{Type: TypeI64, I64: 123},
+			Cell{Type: TypeStr, Str: []byte("ba")},
+			Cell{Type: TypeStr, Str: []byte("b")},
+		},
+		{
+			Cell{Type: TypeI64, I64: 123},
+			Cell{Type: TypeStr, Str: []byte("a")},
+			Cell{Type: TypeStr, Str: []byte("bb")},
+		},
+		{
+			Cell{Type: TypeI64, I64: 123},
+			Cell{Type: TypeStr, Str: []byte("a")},
+			Cell{Type: TypeStr, Str: []byte("bba")},
+		},
+	}
+	keys := []string{}
+	for _, row = range rows {
+		key = row.EncodeKey(schema)
+		keys = append(keys, string(key))
+
+		decoded = schema.NewRow()
+		err = decoded.DecodeKey(schema, key)
+		assert.Nil(t, err)
+		err = decoded.DecodeVal(schema, val)
+		assert.Nil(t, err)
+		assert.Equal(t, row, decoded)
+	}
+	assert.True(t, slices.IsSorted(keys))
+}
+
+// QzBQWVJJOUhU https://trialofcode.org/