Bug 68778: Verify "ignoreMissingFontSystem" for SheetUtil.getDefaultCharWidthAsFloat()

This functionality saw some regressions at times and thus
should be verified via unit-tests. 

We can simulate failures in the low-level font-system by 
mocking the FontRenderContext and triggering exceptions
from there.

This hopefully now verifies behavior of 
SheetUtil.getDefaultCharWidthAsFloat() both with 
"ignoreMissingFontSystem" enabled and disabled.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1916297 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 19 insertions, 2 deletions

diff --git a/poi/src/main/java/org/apache/poi/ss/util/SheetUtil.java b/poi/src/main/java/org/apache/poi/ss/util/SheetUtil.java
index cc5abe81b1..f90d229895 100644
--- a/poi/src/main/java/org/apache/poi/ss/util/SheetUtil.java
+++ b/poi/src/main/java/org/apache/poi/ss/util/SheetUtil.java
@@ -96,13 +96,13 @@ public class SheetUtil {
     /**
      * drawing context to measure text
      */
-    private static final FontRenderContext fontRenderContext = new FontRenderContext(null, true, true);
+    private static FontRenderContext fontRenderContext = new FontRenderContext(null, true, true);
 
     /**
      * A system property which can be enabled to not fail when the
      * font-system is not available on the current machine
      */
-    private static final boolean ignoreMissingFontSystem =
+    private static boolean ignoreMissingFontSystem =
             Boolean.parseBoolean(System.getProperty("org.apache.poi.ss.ignoreMissingFontSystem"));
 
     /**
@@ -490,4 +490,21 @@ public class SheetUtil {
         //  live within any merged regions
         return null;
     }
+
+    // Getters/Setters are available to allow in-depth testing
+    protected static boolean isIgnoreMissingFontSystem() {
+        return ignoreMissingFontSystem;
+    }
+
+    protected static void setIgnoreMissingFontSystem(boolean value) {
+        ignoreMissingFontSystem = value;
+    }
+
+    protected static FontRenderContext getFontRenderContext() {
+        return fontRenderContext;
+    }
+
+    protected static void setFontRenderContext(FontRenderContext fontRenderContext) {
+        SheetUtil.fontRenderContext = fontRenderContext;
+    }
 }