1 files changed, 29 insertions, 0 deletions
diff --git a/v_windows/v/vlib/v/tests/string_interpolation_floats_test.v b/v_windows/v/vlib/v/tests/string_interpolation_floats_test.v
new file mode 100644
index 0000000..5809f68
--- /dev/null
+++ b/v_windows/v/vlib/v/tests/string_interpolation_floats_test.v
@@ -0,0 +1,29 @@
+fn test_f32_widths_and_precision() {
+	x := f32(200.43)
+	assert '|${x:10.4f}|' == '|  200.4300|'
+	assert '|${x:-10.4f}|' == '|200.4300  |'
+	assert '|${x:10.0f}|' == '|       200|'
+	assert '|${x:-10.0f}|' == '|200       |'
+	//
+	assert '|${x:0.4f}|' == '|200.4300|'
+	assert '|${x:.3f}|' == '|200.430|'
+	assert '|${x:.0f}|' == '|200|'
+	//
+	y := f32(200.90)
+	assert '|${y:.0f}|' == '|201|'
+}
+
+fn test_f64_widths_and_precision() {
+	x := f64(200.43)
+	assert '|${x:10.4f}|' == '|  200.4300|'
+	assert '|${x:-10.4f}|' == '|200.4300  |'
+	assert '|${x:10.0f}|' == '|       200|'
+	assert '|${x:-10.0f}|' == '|200       |'
+	//
+	assert '|${x:0.4f}|' == '|200.4300|'
+	assert '|${x:.3f}|' == '|200.430|'
+	assert '|${x:.0f}|' == '|200|'
+	//
+	y := f64(200.90)
+	assert '|${y:.0f}|' == '|201|'
+}