Add test case for /ResetForm actions.

Change-Id: If01e045a248ac7edd1d4070f0149762cda8b0a38
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/93313
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/testing/resources/pixel/checkbox_radiobutton_reset.in b/testing/resources/pixel/checkbox_radiobutton_reset.in
new file mode 100644
index 0000000..4154ef2
--- /dev/null
+++ b/testing/resources/pixel/checkbox_radiobutton_reset.in
@@ -0,0 +1,211 @@
+{{header}}
+{{object 1 0}} <<
+  /Type /Catalog
+  /Pages 2 0 R
+  /AcroForm <<
+    /Fields [5 0 R 6 0 R 7 0 R 9 0 R]
+  >>
+  /OpenAction 13 0 R
+>>
+endobj
+{{object 2 0}} <<
+  /Type /Pages
+  /Count 1
+  /Kids [3 0 R]
+>>
+endobj
+{{object 3 0}} <<
+  /Type /Page
+  /Parent 2 0 R
+  /MediaBox [0 0 300 300]
+  /Contents 4 0 R
+  /Annots [5 0 R 6 0 R 8 0 R 10 0 R]
+>>
+endobj
+{{object 4 0}} <<
+  {{streamlen}}
+>>
+stream
+q
+q
+1 w
+1 0 1 RG
+1 .752941 .796078 rg
+n 135.5 250.5 19 19 re B*
+Q
+q
+2 w
+.1 .1 .1 RG
+.8 .843 1 rg
+n 136 211 18 18 re B*
+Q
+q
+2 w
+0 .501961 0 RG
+0 0 1 rg
+n
+104 110 m
+104 114.9706 99.97056 119 95 119 c
+90.02944 119 86 114.9706 86 110 c
+86 105.0294 90.02944 101 95 101 c
+99.97056 101 104 105.0294 104 110 c
+B*
+Q
+q
+2 w
+0 .501961 0 RG
+0 0 1 rg
+n
+104 60 m
+104 64.97056 99.97056 69 95 69 c
+90.02944 69 86 64.97056 86 60 c
+86 55.02944 90.02944 51 95 51 c
+99.97056 51 104 55.02944 104 60 c
+B*
+Q
+Q
+endstream
+endobj
+{{object 5 0}} <<
+  /Type /Annot
+  /Subtype /Widget
+  /FT /Btn
+  /Ff 1
+  /Rect [135 250 155 270]
+  /T (readOnlyCheckbox)
+  /AP <<
+    /N <<
+      /Yes 11 0 R
+    >>
+  >>
+  /AS /Off
+>>
+endobj
+{{object 6 0}} <<
+  /Type /Annot
+  /Subtype /Widget
+  /FT /Btn
+  /Ff 2
+  /Rect [135 210 155 230]
+  /T (checkbox)
+  /AP <<
+    /N <<
+      /Yes 11 0 R
+    >>
+  >>
+  /AS /Off
+>>
+endobj
+{{object 7 0}} <<
+  /FT /Btn
+  /Ff 49153
+  /T (readOnlyRadioButton)
+  /Kids [8 0 R]
+>>
+endobj
+{{object 8 0}} <<
+  /Type /Annot
+  /Subtype /Widget
+  /T (Widget8)
+  /FT /Btn
+  /Parent 7 0 R
+  /Rect [85 100 105 120]
+  /AP <<
+    /N <<
+      /value1 12 0 R
+    >>
+  >>
+  /AS /Off
+>>
+endobj
+{{object 9 0}} <<
+  /FT /Btn
+  /Ff 49154
+  /T (radioButton)
+  /Kids [10 0 R]
+>>
+endobj
+{{object 10 0}} <<
+  /Type /Annot
+  /Subtype /Widget
+  /FT /Btn
+  /Parent 9 0 R
+  /Rect [85 50 105 70]
+  /AP <<
+    /N <<
+      /value1 12 0 R
+    >>
+  >>
+  /AS /Off
+>>
+endobj
+{{object 11 0}} <<
+  /Type /XObject
+  /Subtype /Form
+  /FormType 1
+  /BBox [0 0 20 20]
+  {{streamlen}}
+>>
+stream
+q
+.1 .1 .1 rg .1 .1 .1 RG
+17.2 15.95145 m
+11.20694 10 l
+17.2 4.027746 l
+15.97225 2.8 l
+10 8.793064 l
+4.027746 2.8 l
+2.8 4.027746 l
+8.813873 10 l
+2.8 15.97225 l
+4.027746 17.2 l
+10 11.20694 l
+15.97225 17.2 l
+17.2 15.95145 l
+h
+f
+Q
+endstream
+endobj
+{{object 12 0}} <<
+  /Type /XObject
+  /Subtype /Form
+  /FormType 1
+  /BBox [0 0 20 20]
+  {{streamlen}}
+>>
+stream
+q
+1 .752941 .796078 rg 1 .752941 .796078 RG
+17.2 15.95145 m
+11.20694 10 l
+17.2 4.027746 l
+15.97225 2.8 l
+10 8.793064 l
+4.027746 2.8 l
+2.8 4.027746 l
+8.813873 10 l
+2.8 15.97225 l
+4.027746 17.2 l
+10 11.20694 l
+15.97225 17.2 l
+17.2 15.95145 l
+h
+f
+Q
+endstream
+endobj
+% Make some buttons be reset. Note that /T as an array of dict references
+% does not seem to work as expected. /Flags 1 means all fields *except*
+% those listed.
+{{object 13 0}} <<
+  /Type /Action
+  /S /ResetForm
+  /Fields [(readOnlyRadioButton.Widget8) (readOnlyCheckbox)]
+  /Flags 1
+>>
+endobj
+{{xref}}
+{{trailer}}
+{{startxref}}
+%%EOF
diff --git a/testing/resources/pixel/checkbox_radiobutton_reset_expected.pdf.0.png b/testing/resources/pixel/checkbox_radiobutton_reset_expected.pdf.0.png
new file mode 100644
index 0000000..dd94188
--- /dev/null
+++ b/testing/resources/pixel/checkbox_radiobutton_reset_expected.pdf.0.png
Binary files differ
diff --git a/testing/resources/pixel/checkbox_radiobutton_reset_expected_skia.pdf.0.png b/testing/resources/pixel/checkbox_radiobutton_reset_expected_skia.pdf.0.png
new file mode 100644
index 0000000..057ecda
--- /dev/null
+++ b/testing/resources/pixel/checkbox_radiobutton_reset_expected_skia.pdf.0.png
Binary files differ