feat: add tests for stages 1 - 3

Use MultiCommandTestCase for testTxIncr1, testTxIncr2, and testTxIncr3

internal/test_txn_incr1.go

@@ -0,0 +1,44 @@
+package internal
+
+import (
+	"fmt"
+
+	"github.com/codecrafters-io/redis-tester/internal/redis_executable"
+	"github.com/codecrafters-io/redis-tester/internal/resp_assertions"
+
+	"github.com/codecrafters-io/redis-tester/internal/instrumented_resp_connection"
+	"github.com/codecrafters-io/redis-tester/internal/test_cases"
+	"github.com/codecrafters-io/tester-utils/random"
+	"github.com/codecrafters-io/tester-utils/test_case_harness"
+)
+
+func testTxIncr1(stageHarness *test_case_harness.TestCaseHarness) error {
+	b := redis_executable.NewRedisExecutable(stageHarness)
+	if err := b.Run(); err != nil {
+		return err
+	}
+
+	logger := stageHarness.Logger
+
+	client, err := instrumented_resp_connection.NewFromAddr(stageHarness, "localhost:6379", "client")
+	if err != nil {
+		logFriendlyError(logger, err)
+		return err
+	}
+	defer client.Close()
+
+	randomValue := random.RandomInt(1, 100)
+
+	multiCommandTestCase := test_cases.MultiCommandTestCase{
+		Commands: [][]string{
+			{"SET", "foo", fmt.Sprint(randomValue)},
+			{"INCR", "foo"},
+		},
+		Assertions: []resp_assertions.RESPAssertion{
+			resp_assertions.NewStringAssertion("OK"),
+			resp_assertions.NewIntegerAssertion(randomValue + 1),
+		},
+	}
+
+	return multiCommandTestCase.RunAll(client, logger)
+}

internal/test_txn_incr2.go

@@ -0,0 +1,39 @@
+package internal
+
+import (
+	"github.com/codecrafters-io/redis-tester/internal/redis_executable"
+	"github.com/codecrafters-io/redis-tester/internal/resp_assertions"
+
+	"github.com/codecrafters-io/redis-tester/internal/instrumented_resp_connection"
+	"github.com/codecrafters-io/redis-tester/internal/test_cases"
+	"github.com/codecrafters-io/tester-utils/test_case_harness"
+)
+
+func testTxIncr2(stageHarness *test_case_harness.TestCaseHarness) error {
+	b := redis_executable.NewRedisExecutable(stageHarness)
+	if err := b.Run(); err != nil {
+		return err
+	}
+
+	logger := stageHarness.Logger
+
+	client, err := instrumented_resp_connection.NewFromAddr(stageHarness, "localhost:6379", "client")
+	if err != nil {
+		logFriendlyError(logger, err)
+		return err
+	}
+	defer client.Close()
+
+	multiCommandTestCase := test_cases.MultiCommandTestCase{
+		Commands: [][]string{
+			{"INCR", "foo"},
+			{"INCR", "foo"},
+		},
+		Assertions: []resp_assertions.RESPAssertion{
+			resp_assertions.NewIntegerAssertion(1),
+			resp_assertions.NewIntegerAssertion(2),
+		},
+	}
+
+	return multiCommandTestCase.RunAll(client, logger)
+}

internal/test_txn_incr3.go

@@ -0,0 +1,41 @@
+package internal
+
+import (
+	"github.com/codecrafters-io/redis-tester/internal/redis_executable"
+	"github.com/codecrafters-io/redis-tester/internal/resp_assertions"
+
+	"github.com/codecrafters-io/redis-tester/internal/instrumented_resp_connection"
+	"github.com/codecrafters-io/redis-tester/internal/test_cases"
+	"github.com/codecrafters-io/tester-utils/test_case_harness"
+)
+
+func testTxIncr3(stageHarness *test_case_harness.TestCaseHarness) error {
+	b := redis_executable.NewRedisExecutable(stageHarness)
+	if err := b.Run(); err != nil {
+		return err
+	}
+
+	logger := stageHarness.Logger
+
+	client, err := instrumented_resp_connection.NewFromAddr(stageHarness, "localhost:6379", "client")
+	if err != nil {
+		logFriendlyError(logger, err)
+		return err
+	}
+	defer client.Close()
+
+	randomValue := "xyz"
+
+	multiCommandTestCase := test_cases.MultiCommandTestCase{
+		Commands: [][]string{
+			{"SET", "foo", randomValue},
+			{"INCR", "foo"},
+		},
+		Assertions: []resp_assertions.RESPAssertion{
+			resp_assertions.NewStringAssertion("OK"),
+			resp_assertions.NewErrorAssertion("ERR value is not an integer or out of range"),
+		},
+	}
+
+	return multiCommandTestCase.RunAll(client, logger)
+}