1 files changed, 184 insertions, 0 deletions
diff --git a/tests/test-print.cpp b/tests/test-print.cpp
new file mode 100644
index 0000000..bdc1894
--- /dev/null
+++ b/tests/test-print.cpp
@@ -0,0 +1,184 @@
+/*
+ * print-test.cpp
+ *
+ * Tests the various Print methods. (For USBSerial; assuming that
+ * writing a single character works, this should generalize to
+ * HardwareSerial).
+ *
+ * This file is released into the public domain.
+ */
+
+#include <wirish/wirish.h>
+#undef min
+#undef max
+
+// For snprintf()
+#include <stdio.h>
+// The <limits.h> that comes with newlib is missing LLONG_MAX, etc.
+#include <limits>
+
+using namespace std;
+
+#define BUF_SIZE 100
+char buf[BUF_SIZE];
+
+void test_numbers(void);
+void test_base_arithmetic(void);
+void test_floating_point(void);
+
+void print_separator(void);
+
+void setup() {
+    while (!SerialUSB.available())
+        continue;
+    SerialUSB.read();
+}
+
+void loop() {
+    SerialUSB.println("Testing Print methods.");
+    print_separator();
+
+    test_numbers();
+    print_separator();
+
+    test_base_arithmetic();
+    print_separator();
+
+    test_floating_point();
+    print_separator();
+
+    SerialUSB.println("Test finished.");
+    while (true) {
+        continue;
+    }
+}
+
+void test_numbers(void) {
+    SerialUSB.println("Numeric types:");
+
+    SerialUSB.print("unsigned char: ");
+    // prevent Print from treating it as an (extended) ASCII character:
+    SerialUSB.println((uint32)numeric_limits<unsigned char>::max());
+
+    SerialUSB.print("int: ");
+    SerialUSB.print(numeric_limits<int>::min());
+    SerialUSB.print(" -- ");
+    SerialUSB.println(numeric_limits<int>::max());
+
+    SerialUSB.print("unsigned int: ");
+    SerialUSB.print(numeric_limits<unsigned int>::max());
+    SerialUSB.println();
+
+    SerialUSB.print("long: ");
+    SerialUSB.print(numeric_limits<long>::min());
+    SerialUSB.print(" -- ");
+    SerialUSB.println(numeric_limits<long>::max());
+
+    SerialUSB.print("long long: ");
+    SerialUSB.print(numeric_limits<long long>::min());
+    SerialUSB.print(" -- ");
+    SerialUSB.println(numeric_limits<long long>::max());
+
+    SerialUSB.print("unsigned long long: ");
+    SerialUSB.println(numeric_limits<unsigned long long>::max());
+}
+
+void base_test(int base) {
+    SerialUSB.print("\tuint8: ");
+    SerialUSB.println(numeric_limits<uint8>::max(), base);
+    SerialUSB.print("\tint: ");
+    SerialUSB.print(numeric_limits<int>::max(), base);
+    SerialUSB.print(", unsigned int: ");
+    SerialUSB.println(numeric_limits<unsigned int>::max(), base);
+    SerialUSB.print("\tlong: ");
+    SerialUSB.print(numeric_limits<long>::max(), base);
+    SerialUSB.print(", unsigned long: ");
+    SerialUSB.println(numeric_limits<unsigned long>::max(), base);
+    SerialUSB.print("\tlong long: ");
+    SerialUSB.print(numeric_limits<long long>::max(), base);
+    SerialUSB.print(", unsigned long long: ");
+    SerialUSB.println(numeric_limits<unsigned long long>::max(), base);
+}
+
+void test_base_arithmetic(void) {
+    SerialUSB.println("Base arithmetic:");
+
+    SerialUSB.println("Binary:");
+    base_test(BIN);
+
+    SerialUSB.println("Octal:");
+    base_test(OCT);
+
+    SerialUSB.println("Decimal:");
+    base_test(DEC);
+
+    SerialUSB.println("Hexadecimal:");
+    base_test(HEX);
+}
+
+void test_floating_point(void) {
+    double dmax = numeric_limits<double>::max();
+
+    SerialUSB.println("Floating point:");
+
+    SerialUSB.print("println(-5.67): ");
+    SerialUSB.print(-5.67);
+    SerialUSB.print(". println(5.67, 5): ");
+    SerialUSB.println(5.67, 5);
+    SerialUSB.print("println((double)(LLONG_MAX - 10)):                 ");
+    SerialUSB.print((double)(numeric_limits<long long>::max() - 10));
+    SerialUSB.print("; from snprintf(): ");
+    snprintf(buf, BUF_SIZE, "%.2f",
+             (double)(numeric_limits<long long>::max() - 10));
+    SerialUSB.println(buf);
+    SerialUSB.print("println((double)LLONG_MAX / 2):                 ");
+    SerialUSB.print((double)(numeric_limits<long long>::max()) / 2);
+    SerialUSB.print("; from snprintf(): ");
+    snprintf(buf, BUF_SIZE, "%.2f",
+             (double)(numeric_limits<long long>::max()) / 2);
+    SerialUSB.println(buf);
+    SerialUSB.print("DBL_MAX:                 ");
+    SerialUSB.print(dmax);
+    SerialUSB.print("; from snprintf(): ");
+    snprintf(buf, BUF_SIZE, "%g", dmax);
+    SerialUSB.println(buf);
+    SerialUSB.print("-DBL_MAX / 2:                 ");
+    SerialUSB.print(-dmax / 2.0);
+    SerialUSB.print("; from snprintf(): ");
+    snprintf(buf, BUF_SIZE, "%g", -dmax / 2.0);
+    SerialUSB.println(buf);
+    SerialUSB.print("Double epsilon, round error: ");
+    SerialUSB.print(numeric_limits<double>::epsilon());
+    SerialUSB.print(", ");
+    SerialUSB.println(numeric_limits<double>::round_error());
+
+    SerialUSB.println();
+
+    float fmax = numeric_limits<float>::max();
+
+    SerialUSB.print("println(-5.67f): ");
+    SerialUSB.println(-5.67f);
+    SerialUSB.print("Float max: ");
+    SerialUSB.println(fmax);
+}
+
+void print_separator(void) {
+    SerialUSB.println();
+    SerialUSB.println(" ** ");
+    SerialUSB.println();
+}
+
+// Force init to be called *first*, i.e. before static object allocation.
+// Otherwise, statically allocated objects that need libmaple may fail.
+__attribute__((constructor)) void premain() {
+    init();
+}
+
+int main(void) {
+    setup();
+
+    while (1) {
+        loop();
+    }
+    return 0;
+}