tests/indent: add multiple C/C++ tests

lua/tests/indent/c/array.c

@@ -0,0 +1,14 @@
+int x[] = {
+    1, 2, 3,
+    4, 5,
+    6
+};
+
+int y[][2] = {
+    {0, 1},
+    {1, 2},
+    {
+        2,
+        3
+    },
+};

lua/tests/indent/c/basic.c

@@ -1,11 +0,0 @@
-int foo(int x)
-{
-    if (x > 10) {
-        return x;
-    } else {
-        while (x > 0) {
-            x--;
-        }
-        return 0;
-    }
-}

lua/tests/indent/c/comment.c

@@ -0,0 +1,8 @@
+/**
+ * Function foo
+ * @param[out] x output
+ * @param[in] x input
+ */
+void foo(int *x, int y) {
+    *x = y;
+}

lua/tests/indent/c/cond.c

@@ -0,0 +1,10 @@
+void foo(int x)
+{
+    if (x > 10) {
+        return;
+    } else if (x < -10) {
+        x = -10;
+    } else {
+        x = -x;
+    }
+}

lua/tests/indent/c/enum.c

@@ -0,0 +1,5 @@
+enum foo {
+    A = 1,
+    B,
+    C,
+};

lua/tests/indent/c/expr.c

@@ -0,0 +1,12 @@
+void foo(int x, int y)
+{
+    if ((x*x - y*y > 0) ||
+        (x == 1 || y == 1) &&
+        (x != 2 && y != 2)
+    ) {
+        return;
+    }
+
+    int z = (x + y) *
+        (x - y);
+}

lua/tests/indent/c/func.c

@@ -0,0 +1,33 @@
+int f1(int x) {
+    return 1;
+}
+
+int f2(int x)
+{
+    return 1;
+}
+
+int f3(
+    int x
+) {
+    return 1;
+}
+
+int f4(
+    int x,
+    int y
+) {
+    return 1;
+}
+
+int f5(int x,
+    int y)
+{
+    return 1;
+}
+
+int
+f6(int x, int y)
+{
+    return 1;
+}

lua/tests/indent/c/label.c

@@ -0,0 +1,7 @@
+int foo(int x)
+{
+    goto error;
+    return 0;
+error:
+    return 1;
+}

lua/tests/indent/c/loop.c

@@ -0,0 +1,16 @@
+void foo(int x)
+{
+    while (x > 0) {
+        x--;
+        continue;
+    }
+
+    for (int i = 0; i < 5; ++i) {
+        x++;
+        break;
+    }
+
+    do {
+        x++;
+    } while (x < 0);
+}

lua/tests/indent/c/no_braces.c

@@ -3,4 +3,10 @@ int foo(int x) {
         return 10;
     else
         return x;
+
+    while (1)
+        x++;
+
+    for (int i = 0; i < 3; ++i)
+        x--;
 }

lua/tests/indent/c/preproc_cond.c

@@ -0,0 +1,10 @@
+void foo(int x)
+{
+    x = x + 1;
+#if 1
+    x = x + 2;
+#else
+    x = x + 3;
+#endif
+    x = x + 4;
+}

lua/tests/indent/c/preproc_func.c

@@ -0,0 +1,9 @@
+#define FOO(x) do { \
+        x = x + 1;  \
+        x = x / 2;  \
+    } while (x > 0);
+
+void foo(int x)
+{
+    FOO(x);
+}

lua/tests/indent/c/string.c

@@ -0,0 +1,5 @@
+const char *a = "hello \
+world";
+
+const char *b = "hello "
+    "world";

lua/tests/indent/c/struct.c

@@ -0,0 +1,11 @@
+struct foo {
+    int a;
+    struct bar {
+        int x;
+    } b;
+};
+
+union baz {
+    struct foo;
+    int x;
+};

lua/tests/indent/c/switch.c

@@ -0,0 +1,16 @@
+void foo(int x) {
+    switch (x) {
+        case 1:
+            x += 1;
+            break;
+        case 2: x += 2;
+            break;
+        case 3: x += 3; break;
+        case 4: {
+            x += 4;
+            break;
+        }
+        default:
+            x = -x;
+    }
+}

lua/tests/indent/c/ternary.c

@@ -0,0 +1,6 @@
+void foo(int x)
+{
+    int y = (x > 10) ? 10
+        : (x < -10) ? -10
+        : x;
+}

lua/tests/indent/cpp/access.cpp

@@ -0,0 +1,6 @@
+class Foo {
+public:
+    int x;
+private:
+    int y;
+};

lua/tests/indent/cpp/class.cpp

@@ -0,0 +1,7 @@
+class Foo {
+    int x;
+    class Bar {
+        int y;
+    };
+    Bar z;
+};

lua/tests/indent/cpp/stream.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+
+void foo(int x) {
+    std::cout << x
+        << x + 1
+        << x + 2;
+}

lua/tests/indent/cpp_spec.lua

@@ -0,0 +1,23 @@
+local whole_file = require('nvim-treesitter.test_utils').indent_whole_file
+local scan_dir = require('plenary.scandir').scan_dir
+local Path = require('plenary.path')
+
+describe('indent C++:', function()
+  describe('whole file:', function()
+    local files = scan_dir('lua/tests/indent/c');
+    vim.list_extend(files, scan_dir('lua/tests/indent/cpp'))
+
+    for _, file in ipairs(files) do
+      local name = Path:new(file):make_relative('lua/tests/indent')
+      it(name, function()
+        whole_file(file, {
+          tabstop = 4,
+          shiftwidth = 4,
+          softtabstop = 0,
+          expandtab = true,
+          filetype = 'cpp',
+        })
+      end)
+    end
+  end)
+end)