First test added, changed signature for using pointers beacause i forgot you can't actually change a parameter because c copies everything, stupid from me to forget that

include/lexer.h

@@ -20,6 +20,7 @@ typedef enum {
 
 typedef enum {
     ARRAY_OK = 0,
+    ARRAY_NULL,
     ARRAY_EMPTY,
     ARRAY_OUT_OF_BOUNDS,
     ARRAY_NULL_ARG,
@@ -56,10 +57,11 @@ typedef struct {
 // Basic array functionality
 ASTNodeArray ASTNodeArray_init(size_t size);
 void ASTNodeArray_free(ASTNodeArray *arr);
-ASTNodeArrayErr ASTNodeArray_push(ASTNodeArray arr, ASTNode node);
-ASTNodeArrayErr ASTNodeArray_get(const ASTNodeArray arr, size_t index, ASTNode *out);
+ASTNodeArrayErr ASTNodeArray_push(ASTNodeArray *arr, ASTNode node);
+ASTNodeArrayErr ASTNodeArray_get(const ASTNodeArray *arr, size_t index, ASTNode *out);
 // Out in pop can be NULL so it doesn't return anything
-ASTNodeArrayErr ASTNodeArray_pop(ASTNodeArray arr, size_t index, ASTNode *out);
+ASTNodeArrayErr ASTNodeArray_pop(ASTNodeArray *arr, size_t index, ASTNode *out);
+size_t ASTNodeArray_len(ASTNodeArray *arr);
 
 // Lexer funtions as well as few functionality
 LexerErr tokenize(const char* input, ASTNodeArray *out);

src/lexer.c

@@ -23,58 +23,77 @@ void ASTNodeArray_free(ASTNodeArray *arr) {
     arr->len = 0;
 }
 
-ASTNodeArrayErr ASTNodeArray_get(const ASTNodeArray arr, size_t index, ASTNode *out) {
+ASTNodeArrayErr ASTNodeArray_get(const ASTNodeArray *arr, size_t index, ASTNode *out) {
+    if (arr == NULL) {
+        return ARRAY_NULL;
+    }
+
     if (out == NULL) {
         return ARRAY_NULL_ARG;
     }
 
-    if (arr.len == 0) {
+    if (arr->len == 0) {
         return ARRAY_EMPTY;
     }
 
-    if (index >= arr.len) {
+    if (index >= arr->len) {
         return ARRAY_OUT_OF_BOUNDS;
     }
 
-    *out = arr.data[index];
+    *out = arr->data[index];
 
     return ARRAY_OK;
 }
 
-ASTNodeArrayErr ASTNodeArray_push(ASTNodeArray arr, ASTNode node) {
-    if (arr.len >= arr.cap) {
-        size_t new_cap = arr.cap * 2;
-        ASTNode *tmp = realloc(arr.data, new_cap * sizeof(ASTNode));
+ASTNodeArrayErr ASTNodeArray_push(ASTNodeArray *arr, ASTNode node) {
+    if (arr == NULL) {
+        return ARRAY_NULL;
+    }
+
+    if (arr->len >= arr->cap) {
+        size_t new_cap = arr->cap * 2;
+        ASTNode *tmp = realloc(arr->data, new_cap * sizeof(ASTNode));
         if (tmp == NULL) {
             return ARRAY_ALLOC;
         }
-        arr.data = tmp;
-        arr.cap = new_cap;
+        arr->data = tmp;
+        arr->cap = new_cap;
     }
 
-    arr.data[arr.len] = node;
-    arr.len += 1;
+    arr->data[arr->len] = node;
+    arr->len = arr->len + 1;
 
     return ARRAY_OK;
 }
 
-ASTNodeArrayErr ASTNodeArray_pop(ASTNodeArray arr, size_t index, ASTNode *out) {
-    if (arr.len == 0) {
+ASTNodeArrayErr ASTNodeArray_pop(ASTNodeArray *arr, size_t index, ASTNode *out) {
+    if (arr == NULL) {
+        return ARRAY_NULL;
+    }
+
+    if (arr->len == 0) {
         return ARRAY_EMPTY;
     }
 
-    if (index >= arr.len) {
+    if (index >= arr->len) {
         return ARRAY_OUT_OF_BOUNDS;
     }
     
     if (out != NULL) {
-        ASTNode node_to_delete = arr.data[index];
+        ASTNode node_to_delete = arr->data[index];
         *out = node_to_delete;
     }
 
-    for (size_t i = index; i < arr.len - 1; i++) {
-        arr.data[index] = arr.data[index + 1];
+    for (size_t i = index; i < arr->len - 1; i++) {
+        arr->data[index] = arr->data[index + 1];
     }
 
     return ARRAY_OK;
 }
+
+size_t ASTNodeArray_len(ASTNodeArray *arr) {
+    if (arr == NULL) {
+        return 0;
+    }
+    return arr->len;
+}

test/CMakeLists.txt

@@ -1,10 +1,10 @@
 find_package(cmocka REQUIRED)
 
-add_executable(test_parser test_parser.c)
+add_executable(test_nodeArray test_ASTNodeArray.c)
 
-target_link_libraries(test_parser
+target_link_libraries(test_nodeArray
     calculator_lib
     cmocka::cmocka
 )
 
-add_test(NAME parser_tests COMMAND test_parser)
+add_test(NAME nodeArray_tests COMMAND test_nodeArray)

test/test_ASTNodeArray.c

@@ -0,0 +1,46 @@
+#include "lexer.h"
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+static void test_array_push(void **state) {
+    (void) state;
+
+    ASTNodeArray arr = ASTNodeArray_init(2);
+    ASTNode node1 = {
+        .type = NODE_NUMBER,
+        .operator = { .number = 90 }
+    };
+
+    ASTNode node2 = {
+        .type = NODE_NUMBER,
+        .operator = { .number = 80 }
+    };
+
+    ASTNode node3 = {
+        .type = NODE_NUMBER,
+        .operator = { .number = 70 }
+    };
+
+    assert_int_equal(ASTNodeArray_push(&arr, node1), ARRAY_OK);
+    assert_int_equal(ASTNodeArray_len(&arr), 1);
+
+    assert_int_equal(ASTNodeArray_push(&arr, node2), ARRAY_OK);
+    assert_int_equal(ASTNodeArray_len(&arr), 2);
+
+    assert_int_equal(ASTNodeArray_push(&arr, node3), ARRAY_OK);
+    assert_int_equal(ASTNodeArray_len(&arr), 3);
+}
+
+
+
+int main(void) {
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(test_array_push),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}