Add first spinbox tests

pyqtgraph/widgets/tests/test_spinbox.py

@@ -0,0 +1,24 @@
+import pyqtgraph as pg
+pg.mkQApp()
+
+def test_spinbox():
+    sb = pg.SpinBox()
+    assert sb.opts['decimals'] == 3
+    assert sb.opts['int'] is False
+    
+    # table  of test conditions:
+    # value, text, options
+    conds = [
+        (0, '0', dict(suffix='', siPrefix=False, dec=False, int=False)),
+        (100, '100', dict()),
+        (1000000, '1e+06', dict()),
+        (1000, '1e+03', dict(decimals=2)),
+        (1000000, '1000000', dict(int=True)),
+        (12345678955, '12345678955', dict(int=True)),
+    ]
+    
+    for (value, text, opts) in conds:
+        sb.setOpts(**opts)
+        sb.setValue(value)
+        assert sb.value() == value
+        assert pg.asUnicode(sb.text()) == text