wip(e2e): adding e2e test for running neva cli not from module's root

.vscode/launch.json

@@ -19,8 +19,8 @@
       "request": "launch",
       "mode": "auto",
       "program": "${workspaceFolder}/cmd/neva",
-      "cwd": "${workspaceFolder}",
-      "args": ["run", "examples/struct_selector"]
+      "cwd": "${workspaceFolder}/e2e/run_cli_not_from_module_root/foo",
+      "args": ["run", "bar"]
     },
     // === LSP ===
     {

e2e/run_cli_not_from_module_root/e2e_test.go

@@ -0,0 +1,55 @@
+package test
+
+// in this file we test files designed specifically for e2e.
+
+import (
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// Test that CLI will go from up to down and find module's manifest
+func Test_UpperThanManifest(t *testing.T) {
+	// go one level up (and go back after test is finished)
+	wd, err := os.Getwd()
+	require.NoError(t, err)
+	defer os.Chdir(wd)
+	require.NoError(t, os.Chdir(".."))
+
+	cmd := exec.Command("neva", "run", "run_cli_not_from_module_root/foo/bar")
+
+	out, err := cmd.CombinedOutput()
+	require.NoError(t, err)
+	require.Equal(
+		t,
+		"42\n",
+		string(out),
+	)
+
+	require.Equal(t, 0, cmd.ProcessState.ExitCode())
+}
+
+// Test that CLI will go from down to up and find module's manifest
+func Test_DownToManifest(t *testing.T) {
+	t.Skip() // FIXME https://github.com/nevalang/neva/issues/571
+
+	// go one level down (and go back after test is finished)
+	wd, err := os.Getwd()
+	require.NoError(t, err)
+	defer os.Chdir(wd)
+	require.NoError(t, os.Chdir("foo"))
+
+	cmd := exec.Command("neva", "run", "bar")
+
+	out, err := cmd.CombinedOutput()
+	require.NoError(t, err)
+	require.Equal(
+		t,
+		"42\n",
+		string(out),
+	)
+
+	require.Equal(t, 0, cmd.ProcessState.ExitCode())
+}

e2e/run_cli_not_from_module_root/foo/bar/main.neva

@@ -0,0 +1,4 @@
+component Main(start) (stop) {
+    nodes { Println }
+    net { :start -> (42 -> println -> :stop) }
+}

e2e/run_cli_not_from_module_root/neva.yml

@@ -0,0 +1 @@
+neva: 0.10.0