# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1651302197 -7200
# Node ID 2cfbcbe86a7c7d291befed2827b4c98a68799545
# Parent  16219eba3a0ad144a2a8a82e7dfcc2a5098f6bdd
#170 first basic write tests

diff -r 16219eba3a0a -r 2cfbcbe86a7c src/buffer.c
--- a/src/buffer.c	Sat Apr 30 08:40:40 2022 +0200
+++ b/src/buffer.c	Sat Apr 30 09:03:17 2022 +0200
@@ -169,6 +169,26 @@
     return len / size;
 }
 
+int cxBufferPut(
+        CxBuffer *buffer,
+        int c
+) {
+    c &= 0xFF;
+    unsigned char const ch = c;
+    if (cxBufferWrite(&ch, 1, 1, buffer) == 1) {
+        return c;
+    } else {
+        return EOF;
+    }
+}
+
+size_t cxBufferPutString(
+        CxBuffer *buffer,
+        const char *str
+) {
+    return cxBufferWrite(str, 1, strlen(str), buffer);
+}
+
 size_t cxBufferRead(
         void *ptr,
         size_t size,
@@ -194,29 +214,6 @@
     return len / size;
 }
 
-int cxBufferPut(
-        CxBuffer *buffer,
-        int c
-) {
-    if (buffer->pos >= buffer->capacity) {
-        if ((buffer->flags & CX_BUFFER_AUTO_EXTEND) == CX_BUFFER_AUTO_EXTEND) {
-            if (cxBufferMinimumCapacity(buffer, buffer->capacity + 1)) {
-                return EOF;
-            }
-        } else {
-            return EOF;
-        }
-    }
-
-    c &= 0xFF;
-    buffer->bytes[buffer->pos] = (unsigned char) c;
-    buffer->pos++;
-    if (buffer->pos > buffer->size) {
-        buffer->size = buffer->pos;
-    }
-    return c;
-}
-
 int cxBufferGet(CxBuffer *buffer) {
     if (cxBufferEof(buffer)) {
         return EOF;
@@ -227,13 +224,6 @@
     }
 }
 
-size_t cxBufferPutString(
-        CxBuffer *buffer,
-        const char *str
-) {
-    return cxBufferWrite(str, 1, strlen(str), buffer);
-}
-
 int cxBufferShiftLeft(
         CxBuffer *buffer,
         size_t shift
diff -r 16219eba3a0a -r 2cfbcbe86a7c test/test_buffer.cpp
--- a/test/test_buffer.cpp	Sat Apr 30 08:40:40 2022 +0200
+++ b/test/test_buffer.cpp	Sat Apr 30 09:03:17 2022 +0200
@@ -258,4 +258,127 @@
     EXPECT_EQ(memcmp(space, "\0\0\0\0\0 test", 10), 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.pos, 0);
+    cxBufferDestroy(&buf);
 }
+
+class BufferWrite : public ::testing::Test {
+protected:
+    CxBuffer buf{};
+
+    void SetUp() override {
+        cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
+        buf.capacity = 8; // artificially reduce capacity to check OOB writes
+        memset(buf.space, 0, 16);
+        memcpy(buf.space, "prep", 4);
+        buf.size = buf.pos = 4;
+    }
+
+    void TearDown() override {
+        cxBufferDestroy(&buf);
+    }
+};
+
+TEST_F(BufferWrite, SizeOneFit) {
+    const char *data = "test";
+    ASSERT_EQ(buf.capacity, 8);
+    ASSERT_EQ(buf.pos, 4);
+    size_t written = cxBufferWrite(data, 1, 4, &buf);
+    EXPECT_EQ(written, 4);
+    EXPECT_EQ(buf.size, 8);
+    EXPECT_EQ(buf.pos, 8);
+    EXPECT_EQ(buf.capacity, 8);
+    EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
+}
+
+TEST_F(BufferWrite, SizeOneOverwrite) {
+
+}
+
+TEST_F(BufferWrite, SizeOnePartialOverwrite) {
+
+}
+
+TEST_F(BufferWrite, SizeOneDiscard) {
+    const char *data = "testing";
+    ASSERT_EQ(buf.capacity, 8);
+    ASSERT_EQ(buf.pos, 4);
+    size_t written = cxBufferWrite(data, 1, 7, &buf);
+    EXPECT_EQ(written, 4);
+    EXPECT_EQ(buf.size, 8);
+    EXPECT_EQ(buf.pos, 8);
+    EXPECT_EQ(buf.capacity, 8);
+    EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
+}
+
+TEST_F(BufferWrite, SizeOneExtend) {
+    buf.flags |= CX_BUFFER_AUTO_EXTEND;
+    const char *data = "testing";
+    ASSERT_EQ(buf.capacity, 8);
+    ASSERT_EQ(buf.pos, 4);
+    size_t written = cxBufferWrite(data, 1, 7, &buf);
+    EXPECT_EQ(written, 7);
+    EXPECT_EQ(buf.size, 11);
+    EXPECT_EQ(buf.pos, 11);
+    EXPECT_GE(buf.capacity, 11);
+    EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
+}
+
+TEST_F(BufferWrite, MultibyteOverwrite) {
+
+}
+
+TEST_F(BufferWrite, MultibytePartialOverwrite) {
+
+}
+
+TEST_F(BufferWrite, MultibyteFit) {
+
+}
+
+TEST_F(BufferWrite, MultibyteDiscard) {
+    // remember: whole elements are discarded if they do not fit
+}
+
+TEST_F(BufferWrite, MultibyteExtend) {
+
+}
+
+TEST_F(BufferWrite, PutcWrapperFit) {
+
+}
+
+TEST_F(BufferWrite, PutcWrapperOverwrite) {
+
+}
+
+TEST_F(BufferWrite, PutcWrapperPartialOverwrite) {
+
+}
+
+TEST_F(BufferWrite, PutcWrapperDiscard) {
+
+}
+
+TEST_F(BufferWrite, PutcWrapperExtend) {
+
+}
+
+TEST_F(BufferWrite, PutStringWrapperFit) {
+
+}
+
+TEST_F(BufferWrite, PutStringWrapperOverwrite) {
+
+}
+
+TEST_F(BufferWrite, PutStringWrapperPartialOverwrite) {
+
+}
+
+TEST_F(BufferWrite, PutStringWrapperDiscard) {
+
+}
+
+TEST_F(BufferWrite, PutStringWrapperExtend) {
+
+}