add update statement

update_test.go

@@ -0,0 +1,41 @@
+package sqimple
+
+import (
+	"testing"
+
+	"github.com/alecthomas/assert/v2"
+)
+
+func TestUpdate(t *testing.T) {
+	type TestCase struct {
+		In     *UpdateStatement
+		Args   []any
+		String string
+	}
+
+	testCases := []TestCase{
+		{
+			In:     Update("customer").Set("name", "Adam"),
+			Args:   []any{"Adam"},
+			String: "update customer set name = ?",
+		},
+		{
+			In:     Update("customer").Set("name", "Adam").Where("id = ?", 1234),
+			Args:   []any{"Adam", 1234},
+			String: "update customer set name = ? where id = ?",
+		},
+		{
+			// Same as previous, but backwards
+			In:     Update("customer").Where("id = ?", 1234).Set("name", "Adam"),
+			Args:   []any{"Adam", 1234},
+			String: "update customer set name = ? where id = ?",
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.String, func(t *testing.T) {
+			assert.Equal(t, testCase.Args, testCase.In.Args(), "collected arguments incorrectly")
+			assert.Equal(t, testCase.String, testCase.In.String(), "stringified incorrectly")
+		})
+	}
+}